CVE-2026-33711 — UNIX Symbolic Link (Symlink) Following

Vendor	Product	Version range	Fixed in
debian	incus	< incus 6.0.6-2 (forky)	incus 6.0.6-2 (forky)
github.com	lxc_incus_v6	>= 0 < 6.23.0	6.23.0
linuxcontainers	incus	< 6.23.0	6.23.0
lxc	incus	< 6.23.0	6.23.0
lxc	incus	>= 0 < 6.0.6-2	6.0.6-2

OSV

Incus vulnerable to local privilege escalation through VM screenshot path in github.com/lxc/incus

osv·2026-04-07

CVE-2026-33711 Incus vulnerable to local privilege escalation through VM screenshot path in github.com/lxc/incus Incus vulnerable to local privilege escalation through VM screenshot path in github.com/lxc/incus Incus vulnerable to local privilege escalation through VM screenshot path in github.com/lxc/incus

OSV

Incus vulnerable to local privilege escalation through VM screenshot path

osv·2026-03-27

CVE-2026-33711 [MEDIUM] Incus vulnerable to local privilege escalation through VM screenshot path Incus vulnerable to local privilege escalation through VM screenshot path ### Summary Incus provides an API to retrieve VM screenshots, that API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up and sent to the user prior to deletion. As Incus uses predictable paths under /tmp for this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when requesting a screenshot. That's because the Linux kernel has a security feature designed to block such attacks, `protected_symlinks`. On the rare systems with this purposefully disabled, it's then possible to trick Incus intro truncating and altering th

GHSA

Incus vulnerable to local privilege escalation through VM screenshot path

ghsa·2026-03-27

CVE-2026-33711 [MEDIUM] CWE-61 Incus vulnerable to local privilege escalation through VM screenshot path Incus vulnerable to local privilege escalation through VM screenshot path ### Summary Incus provides an API to retrieve VM screenshots, that API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up and sent to the user prior to deletion. As Incus uses predictable paths under /tmp for this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when requesting a screenshot. That's because the Linux kernel has a security feature designed to block such attacks, `protected_symlinks`. On the rare systems with this purposefully disabled, it's then possible to trick Incus intro truncating and altering th

OSV

CVE-2026-33711: Incus is a system container and virtual machine manager

osv·2026-03-26·CVSS 4.7

CVE-2026-33711 [MEDIUM] CVE-2026-33711: Incus is a system container and virtual machine manager Incus is a system container and virtual machine manager. Incus provides an API to retrieve VM screenshots. That API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up and sent to the user prior to deletion. As versions prior to 6.23.0 use predictable paths under /tmp for this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when requesting a screenshot. That's because the Linux kernel has a security feature designed to block such attacks, `protected_symlinks`. On the rare systems with this purposefully disabled, it's then possible to trick Incus intro truncating and altering the mode and perm

Red Hat

incus: Incus: Local privilege escalation or denial of service via predictable temporary file paths

vendor_redhat·2026-03-26·CVSS 4.7

CVE-2026-33711 [MEDIUM] CWE-59 incus: Incus: Local privilege escalation or denial of service via predictable temporary file paths incus: Incus: Local privilege escalation or denial of service via predictable temporary file paths Incus is a system container and virtual machine manager. Incus provides an API to retrieve VM screenshots. That API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up and sent to the user prior to deletion. As versions prior to 6.23.0 use predictable paths under /tmp for this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when requesting a screenshot. That's because the Linux kernel has a security feature designed to block such attacks, `protected_symlinks`. On the rare systems with this purp

Debian

CVE-2026-33711: incus - Incus is a system container and virtual machine manager. Incus provides an API t...

vendor_debian·2026·CVSS 4.7

CVE-2026-33711 [MEDIUM] CVE-2026-33711: incus - Incus is a system container and virtual machine manager. Incus provides an API t... Incus is a system container and virtual machine manager. Incus provides an API to retrieve VM screenshots. That API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up and sent to the user prior to deletion. As versions prior to 6.23.0 use predictable paths under /tmp for this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when requesting a screenshot. That's because the Linux kernel has a security feature designed to block such attacks, `protected_symlinks`. On the rare systems with this purposefully disabled, it's then possible to trick Incus intro truncating and altering the mode and perm

CVE-2026-33711: Incus is a system container and virtual machine manager. Incus provides an API to retrieve VM screenshots. That API relies on the use of a temporary file for…

Affected

CVSS provenance